Sequenced%20Data%20Acquisition%20for%20the%20LHC

1
Sequenced Data Acquisition for the LHC

• For LAFS
• Elliott McCrory, Timofei Bolshakov and Dennis
  Nicklaus

2
Outline (From McGinnis)

• Overview
• Why the project is important to CERN?
• Why is Fermilab suited to do this project?
• What needs to be done on the project?
• What type of people are you looking for to work
  on the project?

3
Overview (6 slides)

• Sequenced Data Acquisition (SDA)
• Diagram and Definition (slides 2 3)
• Functional description (4)
• Rip-roaring success at Fermilab
• (5)
• T.B. Excellent ideas for an SDA II
• (6)
• Can think of SDA as a general tool for any
  repeated process
• LHC, ILC
• Industrial applications, etc.

4
SDA
DAEs
SDA DAQ API
SuperTable
Other DAQ
SDA Database
SDA API
SDA Viewer/ Editor/Checker
DLogger Database
Java program
5
Definition of SDA (3/6)

• A special purpose data logging system
• Organizes accelerator data to facilitate
  analysis.
• Collects and stores data according to the stages
  of the accelerator cycles or modes, instead of
  using wall clock time.
• It organizes and presents the data so people and
  programs can use it easily.
• Specifically,
• Defines a temporal abstraction for acquiring and
  storing data about a repeated process, like a
  collider store.
• Encapsulates the progression of time through the
  process by breaking it down into a specific,
  repeated series of stages.
• Data are collected within each stage and are
  stored in a database indexed by the stages.
• The stages are called Shot, Case and Set.
• The cases have descriptive names, in addition to
  a numerical index, facilitating understanding of
  and communication about the process. 

6
SDA Functional Description (4/6)

• Core Functionality
• Data Acquisition
• Database
• API for both
• Support Software
• SDA Viewer
• Look at and plot shot data
• Java implementation
• SDA Edit
• Setup data acquisition
• Store Checker
• Summary Table creation
• Offline Shot Data Analysis (OSDA)
• A Java API
• StorePhysics
• A higher level Java API

7
SDA Success at Fermilab (5/6)

• Almost everyone uses it
• Operators, physicist, engineers, bureaucrats.
• Provides consistent and accurate, yet
  conversational, data from the complex
• Instrumentation verification
• Cross-group measurements
• Transmissions, emittance growth
• Summary information is readily available
• SDA Viewer
• Excel spreadsheet analysis
• Super Table
• Derived Tables
• Java Analysis Studio (JAS)/AIDA
• Contact Derwent
• But, requires a notion of STATES
• And, probably, a Sequencer!

8
SDA II For Fermilab (6/6)

• Bolshakov work
• Based on experience with Tevatron Collider SDA
• Simpler and cleaner implementation
• Better data abstraction
• Class Atom
• Easy to add new types of Atoms
• Better XML support
• DB, structure, DAQ and history All XML
• XML Database
• Simplifies data flow
• Easier to add new types of Shots

9
Why Important for LHC

• Enhance and extend their data logging
• DAQ on event
• Any type of data
• Help with recording fast/dense data streams
• Data stored on LHC over-arching events
• Create a view of the LHC that can be interpreted,
  analyzed and discussed
• Simple tools for studying LHC
• Shot Data Analysis
• Super Table and other summary tables
• Automatic analysis processes
• Automatic creation of summary information about
  LHC
• LHC Super Table?

10
Why Is FNAL Suited?

• We have long experience with SDA
• A functionality that we live/die by, but they
  dont have yet
• We have a concrete beginning
• SDA II
• Coupling with Sequencer
• Enthusiastic core group

11
Status

• Design Thoughts document sent to CERN
• Preliminary response from Mike Lamont
• CERN AB/CO
• He is enthusiastic
• Suggested concrete DAQ vertical tests demos
• Existing data summary/analysis schema (from LEP)
  are a little clumsy
• Asynchronous DAQ to Measurement DB or to Timber
• Can record UTC time stamp of events
• Correlate these two types of readings
• Throughput issue to their data logger, Timber?
• 2000 point snapshot at 40 Hz?
• SDA-II is running at Fermilab
• No DAQ, yet
• Real Soon Now
• See http//lhc001.fnal.gov/SDAII

12
SDA-II To Do

• Tevatron
• DAQ for SDA II
• Demonstrate full, operating system in parallel to
  SDA I
• LHC
• Requirements Document
• Communicate with LHC folks on what they want to
  have in order to make this useful to them
• CERN will probably require a formal document
• Full Functional Specifications
• Again, CERN may require a formal document
• Atom Definitions

• LHC (contd)
• Timeline/STATES definition and implementation
• Together with Sequencer folks
• Initially build SDA on top of Timber??
• Covers maybe 90
• DAQ for things not covered by Timber
• XML DB or push into Timber DB??
• May require new features for Timber
• Fix up existing StorePhysics API
• For use at FNAL and at CERN
• Figure out what else is on this list!

13
Who Can Help?

• Java programmers
• XML speakers
• Super Table/Excel dabblers
• AIDA/JAS mavens
• Timber-savvy people
• Database folks
• Instrumentation workers
• Francophones
• Diplomats